Answers
Answer:
7.030682 kg
hope it helps!
Answer:
7.030682
Explanation:
Related Questions
If you start with 1.5 moles of H2O, how many moles of H4SiO4 do you make?
Answers
Answer:
0.75moles of H₄SiO₄
Explanation:
Given parameters:
Number of moles of H₂O = 1.5moles
Unknown:
Number of moles of H₄SiO₄ = ?
Solution:
To solve this problem, we need to write the reaction equation first;
SiO₂ + 2H₂O → H₄SiO₄
From the balanced reaction equation:
2 moles of water will produce 1 mole of H₄SiO₄
So 1.5 moles of water will produce \(\frac{1.5}{2}\) = 0.75moles of H₄SiO₄
10. What is the acid ionization constant of HCIO₂?
Answers
The acid ionization steady of HCIO₂ (chlorous corrosive) can be spoken to by the taking after condition:
HCIO₂ + H₂O ⇌ H₃O⁺ + CIO₂⁻
The harmony steady expression for this response is:
Ka = [H₃O⁺][CIO₂⁻] / [HCIO₂]
What is the acid ionization constant of HCIO₂?The esteem of the acid ionization consistent (Ka) for HCIO₂ is roughly
1.1 x 10^-2 at 25°C.
It is critical to note that the esteem of Ka can change with temperature, and it is additionally subordinate on the dissolvable utilized.
Learn more about acid ionization constant
https://brainly.com/question/3075008
#SPJ1
Magnesium is a group 2 metal which exists as a number of isotopes and forms many compounds.
Magnesium ions produce no emission of absorption lines in the visible region of the electromagnetic spectrum. Suggest why most magnesium compounds tested in a school laboratory show traces of yellow in the flame
Answers
Answer:
Traces of sodium impurity
Explanation:
Metal ions are identified by a characteristic colour imparted to flame by the metal ion solution. Various metals have various colours which they impart to a flame.
The energy of a flame is not sufficient for the excitation of electrons of Mg to a higher energy level. As a result of this, Mg do not give any color in Bunsen flame.
However, a few tinges of yellow-orange colour which is characteristic of sodium metal do appear when magnesium ions are exposed to a flame as a consequence of traces of sodium impurity in the magnesium ion solution.
Which of these four elements is the most reactive
1: Na
2: Al
3: Rb
4: In
Answers
Answer:
1: Na
Explanation:
Out of the four elements, the most reactive element is sodium (Na).
Sodium is a highly reactive metal because it has only one valence electron in its outermost shell, which is relatively far from the positively charged nucleus. This makes it easy for sodium to lose its outermost electron and form a positively charged ion, which is why it readily reacts with other elements.
Aluminum (Al), rubidium (Rb), and indium (In) are also reactive metals, but they are less reactive than sodium.
Two atoms will likely form a polar covalent bond if the electronegativity difference is
a. 0.1.
b. 1.0.
c. 2.5.
d. 4.0.
Answers
Answer:
b. 1.0
Explanation:
In a covalent bond between Cl and H, ( ) tends to attract electron density from the other element in the bond.
Answers
Answer:
Cl
Explanation:
In a covalent bond between Cl and H, (Cl) tends to attract electron density from the other element in the bond.
Chlorine is more electronegative than hydrogen. In general, elements towards the top-right of the periodic table are more electronegative. This is because these elements are desperate for a few more electrons to fill their outermost shell (and have a full octet). The more electronegative an element is, the more it wants electrons. As a result, highly electronegative atoms have a greater pull on the electrons in a covalent bond.
Can the crabs see the plankton they eat near the ocean floor?
Answers
Answer:
Explanation:
The crabs cannot see the plankton they eat near the ocean floor. For the crabs to see the plankton, some color of visible light would need to reach the plankton so that it can be reflected into the crabs' eyes.
Crabs cannot see the plankton they eat near the ocean floor.
What are Plankton ?Plankton are a collection of tiny organisms that live at and beneath the surface of lakes, rivers, ponds, and oceans across the planet.
Some crabs have colour coding capabilities , but the crabs to see the Planktons the light must reach the plankton , reflect and reach to the eyes of crabs , but the light does not reach inside the ocean and so crabs see the plankton they eat near the ocean floor.
Hence crabs cannot see the plankton they eat near the ocean floor.
To know more about Plankton
https://brainly.com/question/8890104
#SPJ2
sharpining a pencil leaves behind pencil shavings. Is sharpining a pencil a physical change a physical or chemical? Explain
Answers
Answer:
A physical change
Explanation:
Cause when sharpening a pencil the led stays as led and only changes the height of it not the composition of it
Can Some One Help pleasee
Answers
Reactants are carbon dioxide and water, the products are glucose and oxygen. Don't know for sure what the yield is represented with, so, I can't help you with that.
Juan measures a piece of metal and determines it has a mass of 10 grams and a volume of 2 ml
What is the density of the piece of metal?
Answers
Answer:
The answer is 5.0 g/mLExplanation:
The density of a substance can be found by using the formula
\(density = \frac{mass}{volume} \\\)
From the question
mass = 10 g
volume = 2 mL
We have
\(density = \frac{10}{2} \\ \)
We have the final answer as
5.0 g/mLHope this helps you
Answer:
5.0 g/mL
Explanation:
What is the balanced equation for this reaction, which takes place in a basic solution?
Cr(OH)3(s) + ClO3–(aq) → CrO42 (aq) + Cl–(aq)
Cr(OH)3(s) + 2ClO3–(aq) + 6OH–(aq) → 3CrO42–(aq) + 2Cl–(aq) + 2H2O(l)
Cr(OH)3(s) + 2ClO3–(aq) + 4OH–(aq) → 2CrO42–(aq) + Cl–(aq) + 3H2O(l)
2Cr(OH)3(s) + ClO3–(aq) + 4OH–(aq) → 2CrO42–(aq) + Cl–(aq) + 5H2O(l)
2Cr(OH)3(s) + 2ClO3–(aq) + 6OH–(aq) → 2CrO42–(aq) + 2Cl–(aq) + 7H2O(l)
Answers
The balanced equation for the redox reaction, which takes place in a basic solution is:
2 Cr(OH)₃ + ClO₃⁻ (aq) + 4 OH⁻ → 2 CrO₄²⁻ (aq) + Cl⁻ (aq) + 5 H₂O; option CWhat is the balanced equation for the redox reaction?A balanced equation for a redox reaction is one in which the electrons transferred are balanced and the atoms involved in the reaction are also balanced.
To balance redox reactions in a basic solution, OH⁻ ions and H₂O are placed on appropriate sides of the reaction.
Considering the given reaction:
Cr(OH)₃ + ClO₃⁻ (aq) → CrO₄²⁻ (aq) + Cl⁻ (aq):
The balanced equation will be:
2 Cr(OH)₃ + ClO₃⁻ (aq) + 4 OH⁻ → 2 CrO₄²⁻ (aq) + Cl⁻ (aq) + 5 H₂O
The electrons transferred and the atoms involved are balanced.
Learn more about redox reactions at: https://brainly.com/question/21851295
#SPJ1
Choose the formula for ammonium.
ΝΗ,
b NH3
C
(NH)3N
Answers
Answer:
NH4+ will be ammonium, NH3 is ammonia which is the conjugate base of ammonium.
Explanation:
chemistry homework help - letter BHot air is less dense than cold air and this si the reason that hot air balloons float. A hot air balloon on a cool summer morning is filled with air to a volume of 2.60x 10^6L and warmed to 195 degrees fahrenheit(90 degrees celsius). A hot air balloon must be inflated to a volume of approximately 2.80x10^6L in order to float in air. a. At constant pressure, provide a molecular level explanation of the relationship between temperature and volume of a gas.B. Calculate the temperature the gas must be in(celsius in order to float).
Answers
Answer: the volume air necessary must be at 117.93 °C to float
Explanation:
The question requires us to determine the final temperature of air in order to float in a hot air baloon, given its initial temperature and volume and the volume necessary for the baloon to float.
The following information was provided by the question:
initial volume = V1 = 2.60x 10^6 L
initial temperature = T1 = 90 °C
final volume = V2 = 2.80x10^6 L
Considering that the pressure remains constant, we can apply Charle's Law, which matematically states the relationship between temperature and volume of a gas at constant pressure:
\(\frac{V_1}{T_1}=\frac{V_2}{T_2}\)Rearranging the equation to calculate the final temperature, we'll have:
\(T_2=\frac{V_2\times T_1}{V_1}\)Note that the temperature must be used in Kelvin, as it refers to the absolute temperature of the gas. We can convert the initial temperature given from °C to K as:
\(\begin{gathered} T(K)=T(°C)+273.15 \\ T(K)=90°C+273.15=363.15K \end{gathered}\)And, applying the values provided by the question:
\(T_2=\frac{(2.80\times10^6L)\times(363.15K)}{(2.60\times10^6L)}=391.08K\)And we can conver this temperature from K to °C as:
\(\begin{gathered} T(K)=T(°C)+273.15\rightarrow T(°C)=T(K)-273.15 \\ T(°C)=391.08-273.15=117.93°C \end{gathered}\)Therefore, the volume air necessary must be at 117.93 °C to float.
What is the shirt notation for Ba2+
Answers
So, the electronic configuration of Ba2+ is 1s22s22p63s23p63d104s24p64d105s25p65d10.
help me in my hw,wt is physical change and chemical change Answer it asap plz don't spam
Answers
Answer:
Sorry but i don't undertsnad the question.
Explanation:
Answer:
A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape, color, texture, flexibility, density, and mass.
A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust.
Do u want examples ?
The diagram below shows the branching tree diagram for humans. The text box below it shows the set of derived shared characteristics for the branching tree. A slanting, horizontal line is shown. On the extreme left, there is a label that says Common Ancestor. Along the slanting, horizontal line there are five dots labeled from left to right as 1, 2, 3, 4, and 5. There is one vertical line between each of the consecutive five dots. The lines are labeled from left to right as Perch, Frog, Pigeon, Rats, and Human. A text box below the branching tree diagram is labeled Derived Shared Characteristics. In the box it says from left to right, Terrestrial during all stages, Jaws, Walking on two legs, Mammary glands and hair, and Four limbs. Look at the possible derived shared characteristics, shown in the text box. Think about where these should be placed along the branching tree diagram. From the text box, select a shared derived characteristic that frogs and pigeons have. Explain why you think frogs and pigeons share this characteristic.
Answers
Based on the information provided, the shared derived characteristic that frogs and pigeons have is "Jaws."
Frogs and pigeons both belong to the vertebrate group and possess jaws. Jaws are bony structures that are essential for feeding and play a crucial role in the process of digestion. Frogs have well-developed jaws that allow them to catch and consume prey, while pigeons have a beak that serves as their modified jaw structure.
The branching tree diagram indicates that frogs and pigeons branch off at different points, suggesting that they have evolved independently from a common ancestor.
Learn more about branching tree diagrams, here:
https://brainly.com/question/30876426
#SPJ1
How many kilojoules of heat are needed to raise the temperature of 10g of aluminum from 22 degrees C to 55 degrees C, if the specific heat of aluminum is .901 j/gc?
Answers
Answer:
name four agricultural inputs are subsidized by the government
0.297 kJ of heat is needed to raise the temperature of 10g of aluminum from 22 degrees Celsius to 55 degrees Celsius.
The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.
It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.
It is given by the formula -
Q = mcΔT
where, Q = amount of heat
m = mass
c = specific heat
ΔT = Change in temperature
Given,
mass = 10g
c = 0.901J/g⁰C
Initial temperature (T₁) = 22⁰C
Final Temperature (T₂) = 55⁰C
Q = mcΔT
= 10 × 0.901 × (55 -22)
= 297.33 J = 0.297 kJ
Learn more about Specific heat, here:
https://brainly.com/question/31608647
#SPJ1
The atom is neutral because
(10 Points)
O protons
neutrons
O
electrons =neutrons
protons -electrons
O nucleus = electron
Y
Answers
Answer:
the answer is B
Explanation:
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges
Please respond guys I’ll give brainliest and 100 points
Compare and contrast the reactions of lithium and cesium when they are added to water. At least 5 sentences.
Answers
Answer:
Name
Atomic Number
Atomic Symbol
Atomic Weight
Phase
Color
Classification
Group in Periodic Table
Group Name
Period in Periodic Table
Block in Periodic Table
Electronic Configuration
Melting Point
Boiling Point
Electronic Shell Structure
CAS Number
Neighborhood Elements
Lithium
3
Li
6.941
Solid
Silver
alkali metal
1
lithium family
2
s
[He] 2s1
180.54 °C
1342 °C
2, 1
CAS7439-93-2
Neighborhood Elements of Lithium
Cesium
55
Cs
132.90545
Solid
Silver
alkali metal
1
lithium family
6
s
[Xe] 6s1
28.44 °C
671 °C
2, 8, 18, 18, 8, 1
CAS7440-46-2
Neighborhood Elements of Cesium
Explanation:
What ways is carbon added to the atmosphere
Answers
Answer:
One way is through fossil fuels. When people burn fossil fuels it enters the atmosphere as carbon dioxide gas. Another way is through animals. Most animals exhale carbon dioxide as a waste product which gets into the atmosphere.
Guysss how to explain nuclear chemistry? And define nuclear chemistry ?
Answers
Answer:
How do amoeba respire.
Define Diffusion.
Part C
Convert 8x10-4 kg to micrograms.
Express your answer with the appropriate units. Use the appropriate metric symbols for the units.
VO 5 ΑΣΦ
Submit
→
Request Answer
?
ug
Answers
When all the soil pores are essentially water-filled, flow is termed _______________ .
Unsaturated
Saturated
Gravitional
Rapid
Answers
How are gases ionize in a plasma globe?
Answers
Answer:
Plasma globes use high voltage, low current electrical discharges to ionize gases, typically a mixture of noble gases such as argon and neon, inside the globe. The electrical discharge excites the gas atoms, stripping them of their electrons to create a cloud of positively charged ions and negatively charged electrons, also known as plasma. The electrical discharge arcs between the electrodes in the globe, creating the colorful, dancing lights that are characteristic of plasma globes.
Explanation:
1. Approximately how much sodium hydroxide (NaOH, molecular weight = 40.3 g) should be dissolved in 500 ml of distilled water to produce a solution with a molarity near 0.1 M?
2. The molecular weight of KHP is 204.2 g/mol. Calculate the mass of monoprotic KHP needed to titrate 30.00 ml of a 0.1000 M NaOH solution.
Answers
To titrate 30.00 ml of a 0.1000 M \(NaOH\) solution, one needs about 0.6126 g of monoprotic \(KHP\).
1. To calculate the amount of \(NaOH\) needed to make a 0.1 M solution, we first need to calculate the number of moles of \(NaOH\) needed.
Molarity = moles of solute / liters of solution
0.1 M = x moles / 0.5 L
x = 0.05 moles
Now we can calculate the mass of \(NaOH\) needed:
Mass = moles x molecular weight
Mass = 0.05 moles x 40.3 g/mol
Mass = 2.015 g
Therefore, approximately 2.015 g of \(NaOH\) should be dissolved in 500 ml of distilled water to produce a solution with a molarity near 0.1 M.
2. We can use the equation:
Moles of \(NaOH\) = moles of \(KHP\)
Molarity x volume (in liters) of \(NaOH\) = moles of \(KHP\)
0.1000 M x 0.03000 L = moles of \(KHP\)
moles of \(KHP\) = 0.003
Now we can calculate the mass of \(KHP\) needed:
Mass = moles x molecular weight
Mass = 0.003 moles x 204.2 g/mol
Mass = 0.6126 g
Therefore, approximately 0.6126 g of monoprotic \(KHP\) is needed to titrate 30.00 ml of a 0.1000 M \(NaOH\) solution.
For more question on monoprotic
https://brainly.com/question/28556909
#SPJ11
Which of the following statements are true concerning the results of the Human Genome Project? Check all that apply.
Researchers now have maps of every human’s genome.
The Human Genome Project has raised many complicated ethical issues.
All medical conditions can be attributed to a specific gene.
Researchers now have a map of an “average” human genome.
Answers
The following statement is true concerning the results of the Human Genome Project:
The Human Genome Project has raised many complicated ethical issues.
What is Human Genome?
The human genome refers to the complete set of genetic information (DNA) present in human cells. It includes both the protein-coding and non-coding regions of DNA. The human genome is made up of about 3 billion base pairs and is organized into 23 pairs of chromosomes. The study of the human genome is an important field of genetics and has many implications for understanding human biology, evolution, and disease.
The Human Genome Project was a scientific research project that aimed to identify and map all the genes in the human genome, which contains all the genetic information needed for human development and function. The project was completed in 2003 and provided a wealth of information about the structure and function of the human genome, including the location and sequence of all human genes.
Learn more about Human Genome from the given https://brainly.com/question/29479722
#SPJ1
2 dmcube of N2 at a pressure 100kpa and 5dmcube of H2 at pressure of 500kpa are injected into a 10dmcube container, calculate partial pressures of H2 and N2
Answers
The partial pressure of \(N_2\)is 165.6 kPa and the partial pressure of \(H_2\)is 434.4 kPa.
To calculate the partial pressures of \(H_2\)and \(N_2\)in the 10dmcube container, we need to use the ideal gas law equation, which states that the pressure of a gas is directly proportional to its number of moles and temperature, and inversely proportional to its volume.
First, we need to calculate the number of moles for each gas. Since we are given the volume of each gas and the volume of the container, we can use the formula:
Number of moles = Volume / Molar volume
The molar volume is the volume occupied by one mole of a gas at a given temperature and pressure. At standard temperature and pressure (STP), the molar volume is 22.4 L/mol.
For \(N_2\), the number of moles is 2 dmcube / 22.4 L/mol = 0.089 mol
For \(H_2\), the number of moles is 5 dmcube / 22.4 L/mol = 0.223 mol
Next, we can calculate the partial pressures of each gas using the formula:
Partial pressure = (Number of moles / Total number of moles) * Total pressure
The total pressure is the sum of the pressures of each gas:
Total pressure = Pressure of N2 + Pressure of \(H_2\)
Given that the pressure of N2 is 100 kPa and the pressure of \(H_2\)is 500 kPa, we have:
Total pressure = 100 kPa + 500 kPa = 600 kPa
Now we can calculate the partial pressure of \(N_2\):
Partial pressure of \(N_2\)= (0.089 mol / (0.089 mol + 0.223 mol)) * 600 kPa = 165.6 kPa
Similarly, we can calculate the partial pressure of \(H_2\):
Partial pressure of H2 = (0.223 mol / (0.089 mol + 0.223 mol)) * 600 kPa = 434.4 kPa
Therefore, the partial pressure of \(N_2\)is 165.6 kPa and the partial pressure of \(H_2\)is 434.4 kPa.
For more such question on partial pressure visit:
https://brainly.com/question/19813237
#SPJ8
The Kp for the reaction A (g) ⇌ 2 B (g) is 0.0110. What is Kp for the reaction 2 B (g) ⇌ A (g)?
Answers
23.1 G Of HCI (a Strong Acid) Is Added To Water To Make 1250 ML Of Solution.
Answers
Answer:
[H₃O⁺] = 0.0507 M
pH = 1.29
Explanation:
23.1 g of HCI (a strong acid) is added to water to make 1250 mL of solution. Calculate [H₃O⁺] and pH of the solution.
Step 1: Given data
Mass of HCl (solute): 23.1 gVolume of solution: 1250 mLStep 2: Calculate the concentration of HCl
We will use the following expression.
[HCl] = mass HCl / molar mass HCl × liters of solution
[HCl] = 2.31 g / 36.46 g/mol × 1.250 L
[HCl] = 0.0507 M
Step 3: Calculate the concentration of H₃O⁺
HCl is a strong acid according to the following equation.
HCl(aq) + H₂O(l) ⇒ H₃O⁺(aq) + Cl⁻(aq)
The molar ratio of HCl to H₃O⁺ is 1:1. Then, [H₃O⁺] = 0.0507 M.
Step 4: Calculate the pH of the solution
We will use the following expression.
pH = -log [H₃O⁺]
pH = -log 0.0507
pH = 1.29
prop-1-yne + 2HBr/H2O2 = A;
A + 2H2O = B;
B + K2CO3(aq) = C;
C + heat = D;
D + HBr = E.
find the compounds A, B, C, D and E
Answers
Based on the given reactions, the compounds are as follows:
A: The specific product formed from the reaction between prop-1-yne and either 2HBr or H2O2.
B: The product formed when compound A reacts with 2H2O.
C: The product formed when compound B reacts with K2CO3(aq).
D: The product formed from the heat-induced reaction of compound C.
E: The product formed when compound D reacts with HBr.
Based on the given reactions, let's analyze the compounds involved:
Reaction 1: prop-1-yne + 2HBr/H2O2 = A
The reactant prop-1-yne reacts with either 2HBr or H2O2 to form compound A. The specific product formed will depend on the reaction conditions.
Reaction 2: A + 2H2O = B
Compound A reacts with 2H2O (water) to form compound B.
Reaction 3: B + K2CO3(aq) = C
Compound B reacts with K2CO3(aq) (potassium carbonate dissolved in water) to form compound C.
Reaction 4: C + heat = D
Compound C undergoes a heat-induced reaction to form compound D.
Reaction 5: D + HBr = E
Compound D reacts with HBr (hydrobromic acid) to form compound E.
For more such questions on compounds
https://brainly.com/question/704297
#SPJ8